Use CalTrans Quickmaps to check road conditions, chain requirements, and road closures before traveling to Big Bear Lake. Poor road conditions can exist in any season so be sure you're prepared to drive at any time. Tire chains must be carried in your vehicle from November 1 until April 30.
Check the weather before traveling into mountain regions. Sunny weather at your house does not mean sunny weather in Big Bear. Be sure you're prepared for driving in any weather.
Know where you're going. Have your route planned out before you start traveling. Check for road closures or poor road conditions so you don't need to reroute later on.